"But he could," said Oop. "He can go anywhere. In the blinking of an eyelash. That's why the folks at Supernatural continue to put up with him. They hope that someday they can come up with whatever he has got. But Old Ghost is cagey. He's not telling them."

"The real reason for his silence," said Maxwell, "is that he's on Transport's payroll. It's worth their while to keep him quiet. If he revealed his traveling techniques, Transport would go broke. No more need of them. People could just up and go anywhere they wished, on their own-a mile or a million light-years.

"And he's the soul of tact," said Oop. "What he was getting at back there was that unless you are in Bio-mech and can cook up something for yourself, it costs money to have something like that saber-toother."

"Oh, I see," said Carol. "I guess there's truth in that. They do cost a lot of money. But I haven't got that kind of money. My father, before he retired, was in Bio-mech. New York. Sylvester was a joint project of a seminar he headed. The students gave him to my dad."

"I still don't believe," said Oop, "that cat's a bio-mech. He's got that dirty glitter in his eyes when he looks at me."

"As a matter of fact," Carol told him, "there is a lot more bio than mech in all of them today. The name originated when what amounted to a highly sophisticated electronic brain and nervous system was housed in specific protoplasms. But today about the only mechanical things about them are those organs that are likely to wear out if they were made of tissue-the heart, the kidneys, the lungs, things like that. What is being done at Bio-mech today is the actual creations of specific life forms-but you all know that, of course."

"There are some strange stories," Maxwell said. "A group of supermen, kept under lock and key. You have heard of that?"

"Yes, heard of it," she said. "There are always rumors."